Pkfy-P15Vbm-Epkfy-P15Vbm-Er2; Pkfy-P20Vbm-Epkfy-P20Vbm-Er1; Pkfy-P20Vbm-Er2; Pkfy-P25Vbm-Epkfy-P25Vbm-Er1 - Mitsubishi Electric PKFY-P15VBM-E Technical & Service Manual

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TECHNICAL CHANGES

PKFY-P15VBM-E
PKFY-P20VBM-ER1
PKFY-P25VBM-ER1
HEAT EXCHANGER and WATER CUT have been changed.
PKFY-P20VBM-E
PKFY-P25VBM-E
INDOOR CONTROLLER BOARD (I.B.) has been changed.
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SAFETY PRECAUTION

CAUTIONS RELATED TO NEW REFRIGERANT
Cautions for units utilizing refrigerant R407C
Do not use the existing refrigerant piping.
The old refrigerant and lubricant in the existing piping
contain a large amount of chlorine which may cause the
lubricant deterioration of the new unit.
Use "low residual oil piping"
If there is a large amount of residual oil (hydraulic oil, etc.)
inside the piping and joints, deterioration of the lubricant
will result.
Store the piping to be used indoors during
installation and both ends sealed until just
before brazing.
(Store elbows and other joints in a plastic bag.)
If dust, dirt, or water enters the refrigerant cycle,
deterioration of the oil and compressor trouble may result.
Use ESTR , ETHER or HAB as the lubricant to
coat flares and flange connection parts.
If large amount of mineral oil enters, that can cause
deterioration of refrigerant oil etc.
OCH418B
PKFY-P15VBM-ER2

PKFY-P20VBM-ER2

PKFY-P25VBM-ER2

PKFY-P20VBM-ER1
PKFY-P25VBM-ER1
Use liquid refrigerant to charge the system.
If gas refrigerant is used to seal the system, the composition
of the refrigerant in the cylinder will change and performance
may drop.
Do not use a refrigerant other than R407C.
If another refrigerant (R22, etc.) is used, the chlorine in the
refrigerant may cause the lubricant deterioration.
Use a vacuum pump with a reverse flow check valve.
The vacuum pump oil may flow back into the refrigerant
cycle and cause the lubricant deterioration.
Use the specified refrigerant only.
Never use any refrigerant other than that specified.
Doing so may cause a burst, an explosion, or fire when the
unit is being used, serviced, or disposed of.
Correct refrigerant is specified in the manuals and on the
spec labels provided with our products.
We will not be held responsible for mechanical failure,
system malfunction, unit breakdown or accidents caused
by failure to follow the instructions.
Ventilate the room if refrigerant leaks during
operation. If refrigerant comes into contact with
a flame, poisonous gases will be released.
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